A biography of Dusko Popov, who, as "an operative for the Abwehr, SD, MI5, MI6, and FBI during World War II ... seduced countless women--including agents on both sides--spoke five languages, and was a crack shot, all while maintaining his cover as a Yugoslav diplomat"--Amazon.com.

August 1941. Serbian playboy Dusko Popov created a stir at Casino Estoril in Portugal by throwing down an outrageously large baccarat bet to humiliate his opponent. The Serbian was a British double agent, and the money-- which he had just stolen from the Germans-- belonged to the British. Watching at the sideline was none other than Ian Fleming. An operative for the Abwehr, SD, MI5, MI6, and FBI during World War II, Popov seduced countless women, spoke five languages, and was a crack shot. While MI5 desperately needed Popov to deceive the Abwehr about the D-Day invasion, they assured him that a return to the German Secret Service Headquarters in Lisbon would result in torture and execution. He went anyway....